this dipshit is probably confusedly thinking of :b12:, which im told your body does keep enough reserves stored to last a few years before you have real deficiency issues if you go vegan and never supplement (which is why those celebrity exvegans who have the sob stories of "i went vegan for a week and died from lack of b12" are so full of shit). the irony also being that most b12 in animal products comes from supplements fed to the animals anyway

The human body is very resilient.

imagine saying this and not thinking it raises just a couple of red flags that your diet is constantly making you shit blood and putting you in the hospital for bacterial infections